Segment Information - Summary of Results of Operations by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total operating revenues	$ 953,716	$ 1,651,546
Adjusted Property EBITDA	(5,329)	494,777
Other operating expenses
Pre-opening	2,551	27,713
Depreciation and amortization	178,746	136,557
Property charges and other	27,229	2,774
Corporate expenses and other	24,192	62,549
Stock-based compensation	9,364	10,008
Total other operating expenses	242,082	239,601
Operating income (loss)	(247,411)	255,176
Other non-operating income and expenses
Interest income	7,953	7,287
Interest expense, net of amounts capitalized	(128,827)	(93,180)
Change in derivatives fair value	(15,660)	(1,509)
Loss on extinguishment of debt	(843)	0
Other	10,335	(6,358)
Total other non-operating income and expenses	(127,042)	(93,760)
Income (loss) before income taxes	(374,453)	161,416
Provision for income taxes	(75,800)	(1,685)
Net income (loss)	(450,253)	159,731
Net (income) loss attributable to noncontrolling interests	48,216	(54,859)
Net income (loss) attributable to Wynn Resorts, Limited	(402,037)	104,872
Pre-opening expenses excluded from stock-based compensation		300
Commitment to pay salary, tips, and benefits continuation for all U.S. employess for period from April 1 through May 15, 2020
Other non-operating income and expenses
Accrual of net expense related to commitment to pay salary, tips and benefits continuation for all U.S. employees	75,700
Operating Segments | Macau Operations
Segment Reporting Information [Line Items]
Total operating revenues	489,002	1,250,513
Adjusted Property EBITDA	29,384	386,475
Operating Segments | Macau Operations | Wynn Palace
Segment Reporting Information [Line Items]
Total operating revenues	259,513	726,622
Adjusted Property EBITDA	10,176	222,586
Operating Segments | Macau Operations | Wynn Macau
Segment Reporting Information [Line Items]
Total operating revenues	229,489	523,891
Adjusted Property EBITDA	19,208	163,889
Operating Segments | Las Vegas Operations
Segment Reporting Information [Line Items]
Total operating revenues	323,824	401,033
Adjusted Property EBITDA	(22,077)	108,302
Operating Segments | Las Vegas Operations | Commitment to pay salary, tips, and benefits continuation for all U.S. employess for period from April 1 through May 15, 2020
Other non-operating income and expenses
Accrual of net expense related to commitment to pay salary, tips and benefits continuation for all U.S. employees	56,400
Operating Segments | Encore Boston Harbor
Segment Reporting Information [Line Items]
Total operating revenues	140,890	0
Adjusted Property EBITDA	(12,636)	0
Operating Segments | Encore Boston Harbor | Commitment to pay salary, tips, and benefits continuation for all U.S. employess for period from April 1 through May 15, 2020
Other non-operating income and expenses
Accrual of net expense related to commitment to pay salary, tips and benefits continuation for all U.S. employees	19,300
Casino
Segment Reporting Information [Line Items]
Total operating revenues	570,789	1,185,101
Casino | Operating Segments | Macau Operations | Wynn Palace
Segment Reporting Information [Line Items]
Total operating revenues	207,576	623,175
Casino | Operating Segments | Macau Operations | Wynn Macau
Segment Reporting Information [Line Items]
Total operating revenues	190,128	450,242
Casino | Operating Segments | Las Vegas Operations
Segment Reporting Information [Line Items]
Total operating revenues	71,295	111,684
Casino | Operating Segments | Encore Boston Harbor
Segment Reporting Information [Line Items]
Total operating revenues	101,790	0
Rooms
Segment Reporting Information [Line Items]
Total operating revenues	152,681	191,270
Rooms | Operating Segments | Macau Operations | Wynn Palace
Segment Reporting Information [Line Items]
Total operating revenues	19,710	43,314
Rooms | Operating Segments | Macau Operations | Wynn Macau
Segment Reporting Information [Line Items]
Total operating revenues	15,911	28,867
Rooms | Operating Segments | Las Vegas Operations
Segment Reporting Information [Line Items]
Total operating revenues	106,105	119,089
Rooms | Operating Segments | Encore Boston Harbor
Segment Reporting Information [Line Items]
Total operating revenues	10,955	0
Food and beverage
Segment Reporting Information [Line Items]
Total operating revenues	149,414	173,219
Food and beverage | Operating Segments | Macau Operations | Wynn Palace
Segment Reporting Information [Line Items]
Total operating revenues	13,298	28,625
Food and beverage | Operating Segments | Macau Operations | Wynn Macau
Segment Reporting Information [Line Items]
Total operating revenues	9,531	20,975
Food and beverage | Operating Segments | Las Vegas Operations
Segment Reporting Information [Line Items]
Total operating revenues	105,979	123,619
Food and beverage | Operating Segments | Encore Boston Harbor
Segment Reporting Information [Line Items]
Total operating revenues	20,606	0
Entertainment, retail and other
Segment Reporting Information [Line Items]
Total operating revenues	80,832	101,956
Entertainment, retail and other | Operating Segments | Macau Operations | Wynn Palace
Segment Reporting Information [Line Items]
Total operating revenues	18,929	31,508
Entertainment, retail and other | Operating Segments | Macau Operations | Wynn Macau
Segment Reporting Information [Line Items]
Total operating revenues	13,919	23,807
Entertainment, retail and other | Operating Segments | Las Vegas Operations
Segment Reporting Information [Line Items]
Total operating revenues	40,445	46,641
Entertainment, retail and other | Operating Segments | Encore Boston Harbor
Segment Reporting Information [Line Items]
Total operating revenues	$ 7,539	$ 0